MARIETTA, Ga-- Cobb County Police investigators are searching for a man they say murdered his ex-wife in the Marietta home they used to share at 3960 Tall Pine Drive.
Police say Saturday around 11am authorities resonded to a 911 call and found Donna Nations Kristofak, 48, unresponsive. She was transported to Wellstar Kennestone Hospital, where she died a short time later.
According to Officer Mike Bowman, the victim's ex- husband, John Stephen Kristofak, 58, is facing charges of aggravated assault and His whereabouts remain unknown. He was last seen driving a late-model, brown Chevrolet Equinox with the Georgia tag BUV 2635.
According to neighbors the couple divorced about a year ago.
Laurie Marks has a son who was involved in sports along with the Kristofaks' older son.
"They were a great couple. We had them and their two sons over numerous times. We don't know what happened," said Laurie Marks.
Marks' son, Shane, reached out to his friend after the murder.
"My friend was actually home asleep. He said he heard his mom screaming and ran down to the garage. That's when he saw his dad stabbing his mom," said Shane Marks.
11Alive News has learned John Kristofaks was recently released from jail after serving time on a felony conviction of stalking.
Family friends say the person he was accused of stalking was his ex-wife.
Cobb County police say Krisofak is considered armed and dangerous. Anyone with information is asked to call 9-1-1.